Well, generally it's getting loads of great reviews. Some people have been critical. You really have to specifically search for the critical reviews though. It seems to be a well made movie, with a bit of a troubling and ambiguous message.
Also, for a movie that seeks to explore the experiences of blacks living in destitute conditions, it's worth noting that the two screenwriters and director look like this:
http://ia.media-imdb.com/images/M/
[email protected]@._ V1_.jpg
http://ia.media-imdb.com/images/M/
[email protected]@._ V1._SY314_CR1,0,214,314_.jpg
So, I don't know, take from that what you will...